I ran the Update profile option and Update PRL option, with no change.
Then a Sprint rep suggested I check for HTC software updates, which I did and sure enough there was a 174Mb download available, which I installed.
Then I reran the Update profile option and Update PRL option and both indicated an update had been installed.
But I'm still not getting a signal in this location.
At this point I'm ready to take it the Sprint store so they can test it in an RF box.
I did check the map and it indicates our tower is going to be upgraded in the next 6 months, which I can imagine would help, but I'm still concerned that every other Sprint phone in the family works, but mine....